Pneumatic tire.



PATENTED DEG. 4, 1906.

H. C. PAIRGHILD. PNEUMATIG TIRE.

APPLIOATION FILED MAR. so, 1905.

M 2 orc 'HARRY o. EAIRCHILD, oE PASSATO. NEW JERSEY. a

' A PNEUMATICTIRE'.

specification of Letters Patent.

Patented Dec. 4,1906. l

Application had March 30,.1905. Serin No. 252.862.

To all' whom it may concern:

Beit known that I, HARRY C. FAIRCHILD, a citizen of the United States of America, residing at Passaic, in the county of Passaic and State of New Jersey, have inventedcertain new and useful Improvements in Pneumatic Tires for Vehicles, of which the follow ing is aspecification.

My invention relates to a pneumatic tire having within the usual iexible inflatable tube a reserve or idle flexible inflatable tube, both tubes being inclosed within the outer casing of a clencher-tire, but detached from the inner ortion of the outer casing of the tire, said mjlatable tubes being attached to the rim and held in pro er relation to each other by an air-valve aving Within it a second air-valve, -said valves being arranged to inflate the said tubes independently, my invention being particularly adapted to wheels having clenchenrims.` a

The objects of my invention are, rst, it obviates the necessityy for removing the outer casing on the road in the event .of a puncture, as the reserve or idletube may be immediately inflated by simply puin ing air into it; second, by being unattachecl) to the outer casing it is lighter and more simply manufactured; third, the construction of my valves avoids the materialenlargement of the valve-stem in the use of two valves and does not require an aperture in the rim of the wheel large enough to weaken, the rim; fourth, the use of one valve within the other obviates the necessity for two entrances 'at different points to the inflatable tubes, and

. thus affords less opportunity for air leakage,

as in the case of several entrances to-a. neumatic tube; fifth, my construction o one valve within the other keeps the inner valve free from dust, clean, and protected and provides a substantial support for the valve and y inner tube.

My invention consists of the set forth. i

' In the accompanying drawings, Figure 1 devices herein v is a central vertical section of my improved tire. Fig. 2 is a side view of the valve-stem, Fig. 3 is a side "tiew 'of the sleeve valve-stem, partly broken away. Fig. 4 is a longitudinal section on the'line 4.4, Fig. 1, looking in the direction of the arrow and with the outer tire removed. Fig. 5 is a longitudinal sec.- tion on the line 5 5, Fig. l, looking in the diair-valve provided at its rection of the arrow. Fig. 6 is a longitudinal section on the line 6 6, Fig, 2. Fig. l7 is a plan view ofthe washer. view on the line 8 8, Fig. 7.

Similar letters are used to designate similar parts throughout the drawings.

My im roved tire is provided with the outer flexible inflatable tube A and the inner or reserve flexible inflatable tube B, inclosed' within the outer casingX of a clencher-rim, said tubes being connectedto `thevriin and held in pro er relation to each-other by the Fig. 1. The reserve or idle l iniiatable tube B is of lexible rubber and is arranged to fit snugly within thetube A, which alsoiso rubbl so as to cling closely to the rim when the wheel is in motion, and is shown for purposes of illustration, Fig. 1', slightly inflated. The valve C consists of the stem D, a sleeve E, and aninclosing case or cap F.

4The' stem extendin inner end its entire len a` shoulder-bo t head and upon its outer or fellyend an air-ca The stem D is.

screw-threaded on two of its outer sidesand attened on the othery two sides, Figs. 2 and Y5, the screw-thread being omittedand the stem made round and slightly smaller just below the shoulder-bolt, line 6 6, Fig. 2, this construction and also the flattening of the sides being for theurpose of admitting air to the channels in tle extendedcircular disk on the sleeve E, and thence to the tube A. The stem D is provided at its outer or felly end'with an air-cap.

j The sleeve E is screw-threaded within to engage the valve-stem D and on its outside for rim-and-'elly ad 'ustment and has at its inner end an eXtende circulardisk, with channels Iopeningl on the rim of the disk and connecting wit the inner portion of the sleeve, Figs. 3 and 4. This extension-disk serv'es a threefold purpose-first, as a sto per for the air- 4trance to the ytube A; secon to admit air to the tube Athrou h the channels, and, third, as a nut tothe val Washer G ,securely in lace.

, Theinclosing cap the inside to e age with the sleeve-E .and is nlower extremity with an aircap. The inclosing cap F also furnishes a chambered space for the air-cap of the valveve-stem D and holding'the is screw-threaded oni Fig. 8 is a sectional stem D,Fig. 1. My device is also 'provided' 75 i D is provided with a channel Di,

th, and has upon its Y witlia rubber washer G, having a'V-shaped annular shoulder,which is broken for a por tion of the Circle to admit air to the tube A,`

Y' trance in t vIlo vshoulder toward the rfm of the wheel and ce- 4parts alreadya mented or vulcanized to the tube B. The sleeve E is'screwed over the stem D, so that the extension-head of the sleeve comes in contact with the washer G. The reserve tube Bis then worked into'the tube A until an aperture-entrance in the tube A is brbught in correspondence with the entrance or aperture inthe tube B, having the valve D'therein,and to provide against friction when the wheel is in motion powdered soa stone or other suitable substance may be usted between the iniiatable tubes A and B. A rubber patch-washer His passed over the sleeve E and cemented or vulcanized to the tube A, and the inner lock-nut Y (with metal washer) is 'screwed in lace, drawing together the (iiusted. The iuiiatable tubes A B are then arrangedv within the outer casin of the tire and with it lto the rim of the Whee the sleeveE passing through the rim and felly, if a felly is used. The outer locknut Z is A,screwed in ace and the inclosingv cap F screwed over .coming within the chambere'd space thereof.

The operation ,of my device is as follows: The. air-capof the inclosing cap F is removed' and the airump applied to the exposed Aairfbrcing.' the air through the sleeve E, along the flattened-sides of the valve-stem D, through the channels of the extensionv head of the sleeve E, and through the broken portion ofthe V-shaped -shoulder of the washer G, inflating the tube A, the tube B remaining uninflated and inreserve or idle.

In Vthe event/of a puncture of the tube A the.`

inclosingl cap Eis removed, exposing'- the aircapl at t e end of the valve-stem D, which is also removed and the air-pump applied there-v to,'the aill passing through the ort or chanmay beinflated. before startin 6o.

.l l, ner tube B, which thus backs up .55

I ing the place thereof.- To re uce the angernel fof the valve-stem Dand in ating the inor rein forces the punctured tube A, ractlcall tak?.

l ie'e'xtended portion of the sleeve E, the air-capofthe inclosed valve tube AV around the entire circumference-of the tube B within a short space of the valve in either direction.

compartment devices in various relatlonship to each other and attached to the outer casing of the tire; but to my knowledge no one has ever placed one flexible tube within another, leaving them both detached from the inner portion ofthe outer casing of the modern clencher type of tire.

Having fully described my invention, what I clain, and desire to secure by Letters Patent, is-

1.v A pneumatic tire for vehicle-wheels comprising the clencher-rim, the outer casing havin its shouldered ed es -secured in said rim, t e outer fieXible in atable tube Within said casing and independent thereof, the reserve flexible iniiatable tube within said outer inflatable tube', the valve-stem havin the head and an airpassage through it an through said head, the sleeve on said valvestem having the head with air-channels theresleeve, and the washer havin the annular shoulder broken in part; sai lvalve-stem, sleeve and washer being adapted to secure said outer casing and outer land reserve inflatable tubes in proper relation to each other and to the rim of the wheel and to iniiate independently said outer and reserve inflatable tubes, substantially as set forth.

2. In a pneumatic tire for vehicle-wheels having the clencher-rim, the outer casing se-v cured to said rim, the outer flexible iniiatable tube Within said casin but independent thereof, the reserve flexible inatable tube within said outer inflatable tube, the washer having the annular shoulder broken in part and the inclosing air-ca ,the combination of the externallythreade and flattened valvestem having the head on its "inner end and-an air-passage through it and through said head and the internally andxexternal y threaded sleeve having the head on its inner end with the channels therein communicating with the interior of said sleeve and with the air-spacel formed bythe annular shoulder ofthe washer tube, substantially as described j 3. In a pneumatic tire for vehicle-wheels the washer having upon oneface the annular shoulder broken in part, substantially as, described and for the purpose set forth. In testimony whereof I have signed my name to this speciiicationin the presence of J two subscribing witnesses.

HARRY c. FAIRCHILD.

WitrIesses:

v HARRY G. c)WAGENSELLER, N. A. EMnAW.

Iam aware that others have arranged airincommunicating with the interior of `said and the inner surface 'of .the outer inflatable p 

